fix: use lua 5.1 instead of 5.4 for luarocks publish

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: oowl

.github/workflows/publish.yml

@@ -15,7 +15,7 @@ jobs:
       - name: Install LuaRocks
         uses: hishamhm/gh-actions-lua@master
         with:
-          luaVersion: "5.4"
+          luaVersion: "5.1"
 
       - uses: hishamhm/gh-actions-luarocks@master